package cn.ecut.reflection;

import java.lang.reflect.Method;

/**
 * @Author ruanxin
 */
//性能分析
public class Test07 {
    //普通方法调用
    public static void test01(){
        User user=new User();
        long startTime =System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++) {
            user.getName();
        }
        long endTime =System.currentTimeMillis();
        System.out.println("普通方法执行十亿次："+(endTime-startTime)+"ms");
    }

    //反射方法调用
    public static void test02() throws Exception {
        User user=new User();
        Class c1 =  user.getClass();
        Method getName = c1.getMethod("getName", null);
        long startTime =System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++) {
            getName.invoke(user,null);
        }
        long endTime =System.currentTimeMillis();
        System.out.println("反射方法执行十亿次："+(endTime-startTime)+"ms");
    }


    //反射方法调用  关闭检测 (暴力反射)
    public static void test03() throws Exception {
        User user=new User();
        Class c1 =  user.getClass();
        Method getName = c1.getMethod("getName", null);
        getName.setAccessible(true);
        long startTime =System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++) {
            getName.invoke(user,null);
        }
        long endTime =System.currentTimeMillis();
        System.out.println("关闭检测后执行十亿次："+(endTime-startTime)+"ms");
    }

    public static void main(String[] args) throws Exception {
        test01();
        test02();
        test03();
    }
}
